How do I correctly position a Context Menu when I right click a DataGridView's column header?

Question

I would like to extended DataGridView to add a second ContextMenu which to select what columns are visible in the gird. The new ContextMenu will be displayed on right click

Answer 1

You were nearly right. You just need to the apply the PointToScreen method to the calling control:

private void ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
    if (e.Button == System.Windows.Forms.MouseButtons.Right)
    {
        contextMenuStrip.Show(((DataGridView)sender).PointToScreen(e.Location));
    }
}

I think this is the most elegant solution, because it uses only the ColumnHeaderMouseClick arguments and not Cursor.Position.